Hui Zhu, Yanan Li, Yuexiang Xi, Chunli Xin, Cheng Zhou, Zhe Yang, Lang Ruan, Yanyue Li, Yao Peng, Maxim S. Molokeev, Andrey Zolotov, Jing Wang, Zhi Zhou, Mao Xia
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引用次数: 0
Abstract
β-Al2O3 phosphors show good optical properties for highly symmetric lattices and dense frameworks. Here, an abnormal lattice shrinkage phenomenon is found in BaMg1-xZnxAl9.8O17: Cr3+ (BM1-xZxA: Cr3+) phosphors, which can be attributed to the variation in the covalency of the chemical bond. Accordingly, the denser crystal structure caused by the abnormal shrinkage improves the luminescent intensity (67%↑) and the thermal stability (69%→76%@150 °C). Internal/external quantum efficiency (IQE/EQE) of BZA: 0.2Cr3+ reaches 95% and 52.7%, respectively. In addition, the preferential occupation of the Cr3+ ion is discussed through the crystal field strength calculation, low-temperature spectra, and fluorescent lifetime. The unique spectrum of the phosphor derives from the occupation of Cr3+ on the octahedral sites (Al4 and Al1) and the formation of Cr3+-Cr3+ coupling pairs. Finally, the high matching rate between the absorption curve of plant pigment Pfr and the EL spectrum of the as-prepared pc-LED expresses that it can be applied in plant lighting.
期刊介绍:
Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications.
As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics.
The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.